sdn: add notes about bgp controller

diff --git a/pvesdn.adoc b/pvesdn.adoc
index f5a77fc175ccac3fecd7c7bf1befd6bd9d87b1de..60ed0a66ef3fd2fe441507f3e324108f50c67b01 100644 (file)
--- a/pvesdn.adoc
+++ b/pvesdn.adoc
@@ -353,6 +353,10 @@ The BGP controller is not used directly by a zone.
 You can use it to configure FRR to manage BGP peers.
 
 For BGP-EVPN, it can be used to define a different ASN by node, so doing EBGP.
+It can also be used to export evpn routes to a external bgp peer.
+
+NOTE: By default, for a simple full mesh evpn, you don't need to define any extra
+BGP Controller.
 
 Configuration options: